== PRELIMINARY EARTHQUAKE REPORT ==
California Integrated Seismic Net
USGS/ Caltech/ CGS/ UCB/ UCSD/ UNR

Version #2: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.

A microearthquake occurred at 6:26:09 AM (PDT) on Monday, August 10, 2009.
The magnitude 2.5 event occurred 11 km (7 miles) W of Laytonville, CA.
The hypocentral depth is 4 km ( 2 miles).


Magnitude 2.5 - duration magnitude (Md)
Time Monday, August 10, 2009 at 6:26:09 AM (PDT)
Monday, August 10, 2009 at 13:26:09 (UTC)
Distance from Laytonville, CA - 11 km (7 miles) W (275 degrees)
Rockport, CA - 18 km (11 miles) ESE (109 degrees)
Cape Vizcaino, CA - 19 km (12 miles) ESE (104 degrees)
Fort Bragg, CA - 31 km (19 miles) NNE (31 degrees)
Sacramento, CA - 224 km (139 miles) NW (305 degrees)
Coordinates 39 deg. 41.0 min. N (39.684N), 123 deg. 36.8 min. W (123.614W)
Depth 4.1 km (2.5 miles)
Location Quality Good
Location Quality Parameters Nst= 20, Nph= 20, Dmin=3 km, Rmss=0.06 sec, Erho=0.3 km, Erzz=0.4 km, Gp=144 degrees
Event ID# nc71262881
Additional Information map with fault names
Google Earth KML (Requires Google Earth.)
NCSN First Motion Mechanism 1
Waveforms

Did you feel it? || Shake Map North
For more information, see http://quake.wr.usgs.gov/ || Contacts

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